Simulations of FMR for study the shape anisotropy in square hollow nanopillars

Silva, J.F.O. da; Guerra, Y.; Padrón-Hernández, E.

doi:10.1016/j.jmmm.2021.168642

Cited by 11 publications

(5 citation statements)

References 41 publications

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“…The other important piece of information is that the condition for which this occurs strongly depends on the geometry under study. Works in the literature present situations in which the Kittel model is not valid in elds below the anisotropy eld [17].…”

Section: Discussionmentioning

confidence: 99%

FMR in thin films with finite extension

Fuentes

Silva

Padrón-Hernández

2022

Preprint

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Ferromagnetic resonance (FMR) by micromagnetic simulation was carried out in Py circular-shaped films with 2 µm area and thickness of 50 nm. Another geometry with stadium-like format (1 µm of minor axes and 4 µm of major axis) was studied. Ferromagnetic resonance by simulation with an in plane and perpendicular external magnetic field show differences in results if compared the two geometries. The results are relevant, as the dimensions of these objects present an aspect ratio of more than 20 times (side dimension/thickness). The results are quite different as the magnetization maps are different for the two geometries. Even working in the field enough to saturate the material. Analyzes were performed using Kittel's equations for FMR.

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Section: Discussionmentioning

confidence: 99%

FMR in thin films with finite extension

Fuentes

Silva

Padrón-Hernández

2022

Preprint

Self Cite

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“…Over the last decade, there has been considerable research conducted in controlling the chiral magnetic domains [60,61] as well as spin wave properties like frequency modes and damping [62,63] by modifying the thickness and shape anisotropy of nanostructures [64,65]. Hence, nanostructures, rich in various spin-wave modes, are of high importance [66][67][68][69][70]. NSL has also been used to fabricate plasmonic color filters [71,72], waveguides [73,74], and antennas [74][75][76] with high efficiency and tunability [71].…”

Section: Applicationmentioning

confidence: 99%

Stretching the Horizon of Nanosphere Lithography

Ganguly,

Das

2023

Nanotechnology and Nanomaterials

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Periodic nano-structured superlattice with symmetry breaking along the surface as well as thickness is of high importance in plasmonic research due to its immense potential in bio-medical and environmental sensor applications. The structures are rich with electromagnetic hotspots and anisotropic optical properties contributing to the sensitivity of the device. In nanotechnology, nanosphere lithography (NSL) is a promising lithography technique that is in the limelight of research for the last decade due to its simplicity, scalability, and cost-effectiveness. Despite many advantages, the technique is limited in its versatility when it comes to real application. Conventional NSL offers less scope for structural variation with the most common six-fold symmetric structure as the nanosphere mask self-assembles in a hexagonal close-pack fashion due to the very nature of this process. Research efforts have been made to overcome the bottleneck. The conventional NSL approach is modified in combination with other techniques. In this chapter, we discuss the evolution of the NSL technique to achieve maturity. The chapter emphasizes modern NSL formalism associated with techniques like multistep shadow mask deposition and anisotropic etching to achieve 2D and 3D nanostructures with controlled shape, size, inter-structural gap, aspect ratio, sharpness, and special and vertical symmetry. The chapter will serve as an effective knowledge base for further research development in plasmonics, magnonics, and spintronics.

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“…Ferromagnetic resonance (FMR) is a powerful technique to investigate the magnetic properties of ferromagnetic materials, which is based on applying a transverse magnetic field (microwave fields) so that the system absorbs energy at a certain resonance frequency (ω). Da Silva et al [ 12 , 13 ] have investigated the dynamic properties of hollow square nanopillars. Also, the spin wave spectra associated with a confined vortex domain wall within a nanotube has been calculated [ 14 ] as well as the nonreciprocity of spin waves in magnetic nanotubes with helical equilibrium magnetization [ 15 ] and the effects of an external magnetic field on the spin waves of a finite nanotube [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

Dynamic susceptibility of Fe3O4 nanotubes

et al. 2023

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In this work we performed a detailed numerical analysis to investigate the dynamic susceptibility of 1000 nm long Fe3O4 nanotubes by varying the diameter, the tube wall thickness and the magnitude of the external magnetic field applied along the tube axis. We found two well-defined modes, one of low frequency associated with the caps of the nanotubes, and another of high frequency associated with the central area of the nanotubes, which can be controlled by varying the geometry of the tubes or the external magnetic field to which they are subjected. These results allow us to suggest the use of these nanotubes in applications that require controlling the resonant frequency in the GHz range.

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Simulations of FMR for study the shape anisotropy in square hollow nanopillars

Cited by 11 publications

References 41 publications

FMR in thin films with finite extension

FMR in thin films with finite extension

Stretching the Horizon of Nanosphere Lithography

Dynamic susceptibility of Fe3O4 nanotubes

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